Kinghome KD48UHO Error Codes

Updated October 13, 2026 · by Aurora Star Tech Inc.

Kinghome KD48UHO error codes and diagnostic codes. The KD48UHO is a Kinghome heat pump in the Kinghome Ultranixx Eco series.

Homeowner with a heat pump problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Kinghome KD48UHO error codes list

Code	Meaning	Severity
A1	Outdoor fan IPM module protection	High
AC	Outdoor fan startup failure	High
AE	Outdoor fan current detection error	High
AJ	Outdoor fan out-of-step	High
C4	ODU jumper cap error	Medium
C8	ODU drive jumper cap error	Medium
E1	High pressure protection / high-pressure sensor fault	High
E3	Low pressure protection / low-pressure sensor fault	High
E4	Compressor discharge temperature too high	High
EE	Memory chip fault	High
F2	Sensor fault (indoor coil or outdoor condenser)	Medium
F3	Outdoor ambient temperature sensor fault	Medium
F4	Sensor fault (outdoor condenser or discharge)	Medium
F6	Frequency limit for overload / ODU tube sensor fault	Medium
H3	Compressor overload protection	High
H4	Overload protection (high condensing pressure)	High
H5	IPM module protection	Critical
H6	Fan motor feedback fault (indoor or outdoor)	High
H7	Compressor out-of-step	High
HC	PFC protection	High
LC	Compressor start failure	High
P0	Compressor minimum-frequency test / driver reset	Low
P5	Compressor phase overcurrent	High
P7	Module temperature sensor circuit fault	Medium
PA	AC current protection	High
Pc	Drive current detection error	High
PH	DC bus voltage high	High
PL	DC bus voltage low	High
PU	Capacitor charging failure	High
UL	Outdoor fan overcurrent	High

All Kinghome Heat Pump error codes →

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Kinghome KD48UHO error codes list

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